Давайте разберем задачу по частям.
Преобразование утвердительных предложений в отрицательные
Для преобразования предложений в отрицательные добавляем отрицательные частицы “not”.
By 6 o'clock the rain had stopped.
- By 6 o'clock the rain had not stopped.
We were having tea at 5 o'clock.
- We were not having tea at 5 o'clock.
They had been staying at the hotel since May.
- They had not been staying at the hotel since May.
I was flying to London that morning.
- I was not flying to London that morning.
I had known Mark all my life.
- I had not known Mark all my life.
The waiter entered the dark kitchen.
- The waiter did not enter the dark kitchen.
We arrived yesterday evening.
- We did not arrive yesterday evening.
He was constantly missing the first class.
- He was not constantly missing the first class.
I lived in the country last summer.
- I did not live in the country last summer.
Lara had been writing with my pen for a week.
- Lara had not been writing with my pen for a week.
Выбор правильной формы глагола
She looked tired. She ... (planted/was planting/had been planting) flowers all morning.
- She looked tired. She had been planting flowers all morning.
I ... (was playing/played/had played) volleyball when the ball hit my head.
- I was playing volleyball when the ball hit my head.
His clothes were smudgy because he ... (finished/had finished/was finished) painting the walls.
- His clothes were smudgy because he had finished painting the walls.
When I was five my parents ... (were buying/bought/had been buying) a piano for me.
- When I was five my parents bought a piano for me.
Kim ... (was dancing/danced/had danced) when her husband opened the door.
- Kim was dancing when her husband opened the door.
He ... (cut/was cutting/had been cutting) the grass for an hour when suddenly the lawn-mower broke down.
- He had been cutting the grass for an hour when suddenly the lawn-mower broke down.
First I ... (had taken off/took off/was taking off) my coat, then I went to the bathroom.
- First I took off my coat, then I went to the bathroom.
She forgot everything she ... (had studied/was studying/studied) at a driving school.
- She forgot everything she had studied at a driving school.
Поставьте глагол в нужную форму
- Greg didn't answer the phone because he was taking a shower.
- I couldn't find my umbrella, but then I remembered that my sister had taken it to school.
- Frank took the candle and walked downstairs.
- We had been taking the exam for 2 hours when a policeman entered the room.
- I saw Sam in the kitchen. He was washing his hands.
- They washed their windows last spring.
- By the time I came home Jane had already washed the dishes.
- His wife had been washing the mushrooms since the early morning, so he decided to help her.
- By midnight he had done all the work.
- I was doing my homework when you phoned.
- Dad had been doing that crossword since morning.
- She washed her hair and left for work.
Если у вас есть дополнительные вопросы или нужно объяснение какого-то пункта подробнее, дайте знать!